<template>
  <div>
    <img v-bind:src="options.img" @click="editCropperFn()" title="点击上传头像" class="img-circle img-lg" />
    <el-dialog :title="title" :visible.sync="open" width="800px">
      <el-row>
        <el-col :xs="24" :md="12" :style="{height: '350px'}">
          <vue-cropper
            ref="cropper"
            :img="options.img"
            :info="true"
            :autoCrop="options.autoCrop"
            :autoCropWidth="options.autoCropWidth"
            :autoCropHeight="options.autoCropHeight"
            :fixedBox="options.fixedBox"
            @realTimeFn="realTimeFn"
          />
        </el-col>
        <el-col :xs="24" :md="12" :style="{height: '350px'}">
          <div class="avatar-upload-preview">
            <img :src="previews.url" :style="previews.img" />
          </div>
        </el-col>
      </el-row>
      <br />
      <el-row>
        <el-col :lg="2" :md="2">
          <el-upload action="#" :http-request="requestUploadFn" :show-file-list="false" :before-upload="beforeUploadFn">
            <el-button size="small">
              上传
              <i class="el-icon-upload el-icon--right"></i>
            </el-button>
          </el-upload>
        </el-col>
        <el-col :lg="{span: 1, offset: 2}" :md="2">
          <el-button icon="el-icon-plus" size="small" @click="changeScaleFn(1)"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :md="2">
          <el-button icon="el-icon-minus" size="small" @click="changeScaleFn(-1)"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :md="2">
          <el-button icon="el-icon-refresh-left" size="small" @click="rotateLeftFn()"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :md="2">
          <el-button icon="el-icon-refresh-right" size="small" @click="rotateRightFn()"></el-button>
        </el-col>
        <el-col :lg="{span: 2, offset: 6}" :md="2">
          <el-button type="primary" size="small" @click="uploadImgFn()">提 交</el-button>
        </el-col>
      </el-row>
    </el-dialog>
  </div>
</template>

<script>
  import store from "@/store";
  import { VueCropper } from "vue-cropper";
  import { apiUploadAvatar } from "@/api/system/user";

  export default {
    components: { VueCropper },
    props: {
      user: {
        type: Object
      }
    },
    data() {
      return {
        // 是否显示弹出层
        open: false,
        // 弹出层标题
        title: "修改头像",
        options: {
          img: store.getters.avatar, //裁剪图片的地址
          autoCrop: true, // 是否默认生成截图框
          autoCropWidth: 200, // 默认生成截图框宽度
          autoCropHeight: 200, // 默认生成截图框高度
          fixedBox: true // 固定截图框大小 不允许改变
        },
        previews: {}
      };
    },
    methods: {
      // 编辑头像
      editCropperFn() {
        this.open = true;
      },
      // 覆盖默认的上传行为
      requestUploadFn() {
      },
      // 向左旋转
      rotateLeftFn() {
        this.$refs.cropper.rotateLeft();
      },
      // 向右旋转
      rotateRightFn() {
        this.$refs.cropper.rotateRight();
      },
      // 图片缩放
      changeScaleFn(num) {
        num = num || 1;
        this.$refs.cropper.changeScale(num);
      },
      // 上传预处理
      beforeUploadFn(file) {
        if (file.type.indexOf("image/") == -1) {
          this.msgError("文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。");
        } else {
          const reader = new FileReader();
          reader.readAsDataURL(file);
          reader.onload = () => {
            this.options.img = reader.result;
          };
        }
      },
      // 上传图片
      uploadImgFn() {
        this.$refs.cropper.getCropBlob(data => {
          console.log('上传图片', data);
          let formData = new FormData();
          formData.append("avatarfile", data);
          apiUploadAvatar(formData).then(response => {
            if (response.code === 200) {
              this.open = false;
              this.options.img = process.env.VUE_APP_BASE_API + response.imgUrl;
              this.msgSuccess("修改成功");
            } else {
              this.msgError(response.msg);
            }
            this.$refs.cropper.clearCrop();
          });
        });
      },
      // 实时预览
      realTimeFn(data) {
        this.previews = data;
      }
    }
  };
</script>
